Circa 1907. "Aerial bridge. Duluth, Minnesota." Suspended Car Transfer over the Duluth Ship Canal. The gondola could carry 60 tons of cargo across the 300-foot channel with minimal obstruction of the shipping lane. After modification for service as a vertical lift, the span became known as the Aerial Lift Bridge. 8x10 dry plate glass negative, Detroit Publishing Company. View full size.
  BUY PRINT    Circa 1907. "Aerial bridge. Duluth, Minnesota." Suspended Car Transfer over the Duluth Ship Canal. The gondola could carry 60 tons of cargo across the 300-foot channel with minimal obstruction of the shipping lane. After modification for service as a vertical lift, the span became known as the Aerial Lift Bridge. 8x10 dry plate glass negative, Detroit Publishing Company. | Click image for Comments. | Home | Browse All Photos